ellipse
C1Formal, Technical (Mathematics, Astronomy, Linguistics), Academic
Definition
Meaning
A regular oval shape, geometrically defined as the set of all points where the sum of distances to two fixed points (foci) is constant.
1) In linguistics, three dots (...) indicating omission in a quoted text. 2) In astronomy, the elliptical orbit of a celestial body.
Linguistics
Semantic Notes
In geometry, 'ellipse' is a precise term. In everyday language, 'oval' is often used loosely for any egg-shaped form. The linguistic symbol is also called an 'ellipsis' (plural: ellipses).
Dialectal Variation
British vs American Usage
Differences
No significant difference in core meaning or usage. Spelling and pronunciation are consistent. The linguistic symbol is universally referred to by the same term.
Connotations
None specific to either variety.
Frequency
Equally low-frequency in general language, but standard in technical fields in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
The [planet] orbits in an ellipse.An ellipse is defined by its [axes].[Subject] traced/drew an ellipse.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None directly.”
Usage
Context Usage
Business
Rare, except in design or branding contexts (e.g., 'The logo features a stylised ellipse.').
Academic
Common in mathematics, physics, astronomy, and geometry papers.
Everyday
Uncommon; 'oval' is preferred for general description.
Technical
Standard, precise term in geometry, orbital mechanics, and engineering.
Examples
By Part of Speech
verb
British English
- No common verb form.
American English
- No common verb form.
adverb
British English
- No common adverb form.
American English
- No common adverb form.
adjective
British English
- The elliptical mirror created a fascinating distortion.
- She gave an elliptical answer, omitting key details.
American English
- The telescope tracks objects in elliptical orbits.
- His speech was deliberately elliptical, avoiding a direct commitment.
Examples
By CEFR Level
- The child drew an ellipse on the paper.
- A rugby ball is shaped like an ellipse.
- The orbits of planets are not perfect circles but ellipses.
- He used a piece of string and two pins to draw a precise ellipse.
- The architect incorporated a large elliptical window into the design of the building.
- Her response was frustratingly elliptical, leaving us unsure of her true intentions.
- Kepler's first law states that planets move in elliptical orbits with the Sun at one focus.
- The study of conic sections involves analysing the properties of the parabola, hyperbola, and ellipse.
Learning
Memory Aids
Mnemonic
Think: An ELLIPSE is an ELEGANT LIPS shape. The 'ell' sound can remind you of 'elongated' and 'ellipse'.
Conceptual Metaphor
THE PATH OF A BODY IS A GEOMETRIC SHAPE (e.g., 'The comet follows a vast ellipse around the sun.').
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'эллипс' (correct translation).
- Beware of false cognate 'элипс' (incorrect/non-existent).
- The linguistic term 'ellipsis' is 'многоточие'.
Common Mistakes
- Mispronouncing as /ˈelɪps/ (emphasis on first syllable).
- Confusing 'ellipse' (shape) with 'ellipsis' (punctuation).
- Using 'ellipse' and 'oval' interchangeably in technical writing.
Practice
Quiz
In which field is the term 'ellipse' used to describe a punctuation mark?
FAQ
Frequently Asked Questions
In precise geometry, an ellipse is a specific, mathematically defined curve. 'Oval' is a broader, non-technical term for any egg-shaped curve, which may include ellipses.
Yes, both derive from the Greek 'elleipsis', meaning 'omission' or 'falling short'. An ellipsis (...) omits words, while an ellipse is a 'deficient' circle (it falls short of being circular).
No, 'ellipse' is only a noun. The related verb is 'to elide' (to omit), from which we get the noun 'ellipsis'.
An ellipse has two focal points (foci), a major axis (longest diameter), a minor axis (shortest diameter), and its shape is defined by the constant sum of distances from any point on the curve to the two foci.
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